AS1332 Ver la hoja de datos (PDF) - austriamicrosystems AG
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AS1332 Datasheet PDF : 20 Pages
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Datasheet
AS1332
650mA, Step-Down DC-DC Converter for RF Power Amplifiers
1 General Description
2 Key Features
The AS1332 is a step-down DC-DC converter designed
to power radiofrequency (RF) power amplifiers (PAs)
from a single Li-Ion battery. The device also achieves
high-performance in mobile phones and similar RF PA
lid applications.
The AS1332 steps down an input voltage of 2.7V to 5.5V
to output voltages ranging from 1.3V to 3.16V. Using a
a VCON analog input, the output voltage is set for
controlling power levels and efficiency of the RF PA.
v The RF interferences are minimized due to the fixed-
frequency PWM operation. The battery consumption is
ill reduced to 0.01µA (typ.) during shutdown.
Because of the high switching frequencies (2 MHz) tiny
3 Applications t surface-mount components can be used. Additional to
the small size the amount is also small. Only three
G s external components are required, an inductor and two
ceramic capacitors.
A t The AS1332 is available in a 8-pin WL-CSP.
! PWM Switching Frequency: 2MHz
! Single Lithium-Ion Cell Operation (2.7V to 5.5V)
! Dynamic Programmable Output Voltage (1.3V to
3.16V)
! Maximum load capability of 650mA
! High Efficiency (96% Typ at 3.6VIN, 3.16VOUT at
400mA) from internal synchronous rectification
! Current Overload Protection
! Thermal Overload Protection
! Soft Start
! 8-pin WL-CSP
The AS1332 is an ideal solution for cellular phones,
hand-held radios, RF PC cards, and battery powered RF
devices.
s n Figure 1. AS1332 - Typical Application Circuit
am onte VIN
2.7V to 5.5V
c 10 µF
al EN
hnic VCON
Tec0.52V to 1.27V
PVIN
VDD
AS1332
3.3 µH
SW
FB
4.7 µF
VOUT
1.3V to 3.16V
VOUT = 2.5 x VCON
VCON
PGND
AGND
www.austriamicrosystems.com/DC-DC_Step-Down/AS1332
Revision 1.02
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